Castle of Rio

Decentralized Administration of Peloponnese, Western Greece and the Ionian Islands · Greece

Castle of Rio, Greece
Photo: Plenz, CC BY-SA 4.0 via Wikimedia Commons

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An Ottoman-built sea fortress on the Peloponnesian shore of the narrow Rio-Antirrio strait near Patras. Paired with a matching fort across the water, it once controlled the entrance to the Gulf of Corinth.

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